HRM-10 Battery Voltage Internal Resistance Tester

By andibond | 26.01.2026

Product Introduction

The HRM-10 Battery Voltage Internal Resistance Tester is a sophisticated battery voltage and internal resistance tester designed to accurately assess the health and performance of various battery types, ranging from individual cells to complex battery packs. It addresses the critical need for precise battery diagnostics in numerous applications, helping users identify degraded cells, optimize battery longevity, and ensure reliable power delivery. Its uniqueness on the market stems from its high precision, wide measurement capabilities, and advanced data management features, making it an indispensable tool for hobbyists, professional technicians, and anyone involved in battery management, DIY electronics, or quality control for battery assemblies. This device empowers users to make informed decisions about battery maintenance and replacement, thereby enhancing the overall efficiency and safety of their power systems. Check out our other technical reviews for more hardware testing.

Technical Support & Resources

Resources: HRM-10 Battery Voltage Internal Resistance Tester.PDF

Hardware specifications

Core Specifications: HRM-10 Battery Voltage Internal Resistance Tester

• Battery Included: Yes
• High-concerned chemical: None
• Dimensions: 158.7 X 80.5 X 28.4mm
• Operating Temperature: -10°C—+45°C, Relative humidity<80%
• Storage environment: -20°C—+80°C, Relative humidity<80%
• Accuracy Class: ±0.5%
• Testing Voltage Range: 0—±100V (DC)
• Voltage Gear: AUTO, 1V, 10V, 100V
• Measuring Range (Resistance): 0-200Ω
• Resistance Gear: AUTO, 20mΩ, 200mΩ, 2Ω, 20Ω, 200Ω
• Model Number: HRM-10
• Display Type: Analogue Only
• DIY Supplies: Electrical
• Brand Name: FNIRSI
• Origin: Mainland China
• Certification: CE
• Signal frequency: AC 1Khz
• History record: Support
• Charging: TYPE-C interface (5V/1A)
• Built-in battery: 1000mAh lithium battery
• User calibration: Support
• Sorting mode: Support
• Record data export: Support
• Weight: 225g

Available Versions

Available Versions & Selection Guide

The FNIRSI HRM-10 is available in two main versions: the standard HRM-10 and the HRM-10 Full Set, offering users flexibility based on their specific needs and desired accessories.

Features and benefits

Why I love FNIRSI HRM-10 Tester

• High Precision Measurement: With an accuracy class of ±0.5% for both voltage and resistance, the HRM-10 provides highly reliable readings. This precision is crucial for accurately assessing battery health, identifying degraded cells, and ensuring optimal performance in critical applications where even small deviations can impact system stability and longevity.
• Wide Measurement Ranges: The device offers a broad voltage testing range of 0 to ±100V DC and a resistance measuring range of 0 to 200Ω. This extensive capability, coupled with AUTO, 1V, 10V, 100V voltage gears and AUTO, 20mΩ, 200mΩ, 2Ω, 20Ω, 200Ω resistance gears, allows users to test a vast array of batteries, from single cells to complex multi-cell battery packs, without needing multiple specialized instruments.
• Advanced Data Management: The HRM-10 supports history recording, sorting mode, and record data export. These features are invaluable for professionals who need to track battery performance over time, compare multiple batteries, or analyze data on a computer or phone. This capability streamlines quality control processes and facilitates informed decision-making regarding battery maintenance and replacement.
• Integrated Power Solution: Equipped with a built-in 1000mAh lithium battery and a convenient TYPE-C interface for 5V/1A charging, the tester ensures portability and ease of use in various field conditions. Users can rely on the device for extended periods without constant access to external power, making it a truly mobile diagnostic tool.
• Robust and User-Friendly Design: Measuring 158.7 x 80.5 x 28.4mm and weighing 225g, the HRM-10 is designed for portability and durability. It operates reliably in temperatures from -10°C to +45°C with relative humidity below 80%, and can be stored in even harsher conditions (-20°C to +80°C). The inclusion of user calibration support further enhances its utility, allowing for fine-tuning and maintaining measurement accuracy over its lifespan.
• Comprehensive Battery Reference Table: The device comes with an extensive internal resistance measurement reference table, covering various battery capacities and voltages (e.g., 12V batteries from 0.8Ah to 250Ah, 6V batteries from 1.3Ah to 200Ah, and 2V batteries from 100Ah to 2000Ah). This table serves as a practical guide for users to quickly assess the health of their batteries by comparing measured internal resistance values against typical values for different battery types and capacities.

Pros and Cons

Strengths & Weaknesses:

What I Like
— High measurement accuracy for voltage and resistance (±0.5%).
— Wide measurement range for voltage (0-±100V DC) and resistance (0-200Ω).
— Support for data export and sorting mode for analysis.
— Built-in 1000mAh lithium battery with Type-C charging.
— Compact and durable body, suitable for various operating conditions.
— Support for user calibration.
— Includes a detailed reference table for internal resistance values.
— Good build quality and packaging.
Points to Consider
— Kelvin probes may be too short and stiff, making it difficult to measure some battery types (e.g., 21700).
— No storage case included in the kit.
— Potential issues with probe contact (parasitic connection through the spring).
— Some users note that the battery clamp may not fit 32700 batteries without modification.
— The manual may not always be complete or intuitive for all functions.
— One review indicates a resistance calibration issue on firmware version v0.4.
— One review mentions oxidized probes upon delivery.

User reviews

Reviews | Customer Feedback ⭐ 4.9 (267) | Sold (900+)

Authentic Feedback Analysis:
⭐ 5.0/5 | Ш***ч: Cool device, accuracy and functionality! I chose between YR1035+, RC3563, HRM-10 and settled on this one.. Although each has a right to exist)) The only drawback of this (full set) is that 32700 batteries cannot be placed in the clamp (maximum 32650) -> it lacks 10 mm, but these are all quibbles and you can live with it.. you can even modify the movable clamp if you really want to)) ps. from the movable part of the battery clamp, you need to (carefully) cut out ~10 mm with a hacksaw -> lightly sand the surfaces on the block with fine sandpaper -> and glue the perimeter with dichloroethane (the plastic seems to allow it) -> and it will be suitable for 32700
⭐ 5.0/5 | Р***ч: This is my fourth device from this company and only positive emotions. Not all of them have a description in Russian, but there are no other complaints. The control is intuitive, accuracy, ergonomics are top-notch.
⭐ 5.0/5 | С***: Excellent tester. Bought for work. Build quality, good thick wires and a good screen. Compared readings with Fluke and RC3563, a difference of a few tenths when measuring in mOm. A big plus is that when checking a large number of batteries, you can upload data to a computer or phone. Ordered more for colleagues.
⭐ 5.0/5 | З***ч: Delivery was very long — more than a month. It arrived at the post office, beautifully packed in a postal box, inside which was the factory packaging, everything intact. The device itself is excellent, in full set it allows to measure battery resistance up to 21700 without problems. The only thing is, you need to pay attention to the Kelvin probes, at first, with the jaws open, I had a parasitic connection through the spring. After I wiggled the spring and repositioned it, this connection disappeared. Someone wrote that they put a matchstick under the spring for the same purpose.
⭐ 5.0/5 | Ш***в: It works. I checked it on a Soviet DC shunt with a 75 mV drop at 30A, I got a measurement of 2.6 — 2.65 mOhm with a stated shunt resistance of 2.5 mOhm. Calibrated out of the box, so the only setting I changed was the language from Chinese to English.
⭐ 5.0/5 | К***ч: Excellent device. I cannot judge the accuracy, there are no reference ‘measures and weights’. But the main advantage of this device compared to a number of similar ones is the excellent repeatability of measurement results. The spread is a maximum of 3…4 digits of the least significant digit. This is simply necessary for comparison and selection of parts!
⭐ 5.0/5 | К***ч: I had long intended to purchase a similar device, but couldn’t decide between YR1030 or 1035, as it seems everyone makes them. FNIRSI saved me from the agony of choice. I re-measured the parameters of all my batteries and critical high-current wires. The device is simple and pleasant. Quality fashionable packaging. Such a thing is good as a gift too.
⭐ 5.0/5 | Y***k: Arrived in a week. Excellent instrument for checking batteries and individual cells. Recommend to everyone who works with batteries.
⭐ 5.0/5 | С***ч: Excellent device, wonderful device! Fnirsi, well done! Execution at the highest level! One tiny minus — the wires are too thick and stiff, they could have been made with silicone insulation and the probe leads 10 centimeters longer. So I recommend it to everyone! Health and success to all!!!
⭐ 5.0/5 | М***ч: The product matches the description. Good quality. I ordered it for battery assemblies. The complete set. Everything suited me.
⭐ 5.0/5 | Д***ч: Excellent device! Well made, like everything from FNIRSI. Complete set! Very fast delivery!
⭐ 5.0/5 | п***ч: Excellent tester. The wires are a little short for measuring 18650. The seller is excellent. If it weren’t for Russian Post, everything would be perfectly fine.
⭐ 5.0/5 | AliExpress Shopper: Great seller! Fast shipping, excellent communication, and the item arrived exactly as described. Highly recommended!
⭐ 5.0/5 | Б***ч: Excellent device. You can even judge by the packaging. There is an instruction in Russian. I recommend it.
⭐ 5.0/5 | D***r: Very fast delivery, very good build quality of both the product and the probes. Functionality is as described. I am satisfied.
⭐ 5.0/5 | AliExpress Shopper: Very good quality. The product has very good references. Its accuracy is comparable to super expensive devices.
⭐ 5.0/5 | S***h: Corresponds to the description, excellent quality. Menu in English. Instructions in Russian. Minus — no case.
⭐ 5.0/5 | K***h: thanks seller good product
⭐ 5.0/5 | В***о: everything is fine, but the probes are short, it’s difficult to measure a 21700 battery correctly, but overall it’s a very convenient little thing
⭐ 5.0/5 | М***ч: Tester works. Useful device in the household.
⭐ 5.0/5 | Ж***ч: Excellent device. I would like longer wires with probes. And a few reference resistors.
⭐ 5.0/5 | M***i: Very good tester, the best I’ve had so far
⭐ 5.0/5 | Б***ч: The order arrived well packaged. The firmware version is new, not even available on the official website.
⭐ 5.0/5 | AliExpress Shopper: The product is in good condition and works well. The previous one I bought didn’t have a charger, but this one does. I also have a second one for sale. Thank you very much for the good condition and delivery.
⭐ 4.0/5 | D***j: The product is of good quality but I don’t know if it’s really useful for determining different types of batteries since you have to know the original quality of said battery very well, I have to test it more
⭐ 5.0/5 | O***h: The kit came with three cords: two Kelvin and one probe. The device can be calibrated in the menu.
⭐ 5.0/5 | AliExpress Shopper: The product arrived very quickly, well packaged, without damage. Functionality and completeness checked, everything corresponds, I recommend the seller!!!!
⭐ 5.0/5 | J***a: Its very good and sophisticated measuring tool for inner resistance of all types of the batteries.
⭐ 5.0/5 | П***н: the devices arrived without damage, there was a delay for some reason, but it arrived completely discharged, but overall everything is fine, thanks and prosperity to everyone.
⭐ 5.0/5 | O***o: Arrived in Ukraine quickly. The product is of high quality. I recommend the seller!👍
⭐ 5.0/5 | Г***ч: Flawless 👍 in everything, for the household needs of an amateur! Simply 🔥 gorgeous 👍. Starting from the packaging, ending with the quality of materials, accuracy, which is more than enough for household needs. Convenient, mobile. 👍👍👍
⭐ 5.0/5 | a***n: I received the parcel. I’m happy with everything, everything is great, I recommend the seller. Thank you very much.
⭐ 5.0/5 | A***z: Excellent, a little delay but already delivered. I recommend the seller. 👌🏽
⭐ 5.0/5 | Г***ч: Gorgeous. I recommend the set with additional probes and a battery holder.
⭐ 5.0/5 | AliExpress Shopper: arrived quickly, meets requirements and description, quality product
⭐ 5.0/5 | В***ч: Good quality. Correct readings.
⭐ 5.0/5 | М***ч: as always with fnirsi, packaging and the product itself are top-notch
⭐ 5.0/5 | j***h: All ok. works very well, fast delivery, I can recommend this product
⭐ 5.0/5 | Г***ч: Everything arrived great. As for quibbles — the kit does not include any storage case like other Fnirsi devices. I’ll have to look for something, otherwise the full set consists of 3 boxes.
⭐ 5.0/5 | AliExpress Shopper: The manufacturer’s quality is the best on AliExpress.
⭐ 5.0/5 | M***h: Super quality! The device works great! Thanks to the seller!
⭐ 5.0/5 | Е***ч: Everything is great, both the store’s packaging and fast delivery, and the device itself is cool!
⭐ 5.0/5 | AliExpress Shopper: Thanks, good device
⭐ 5.0/5 | M***h: The device is good, performs its function.
⭐ 5.0/5 | AliExpress Shopper: Just a perfect meter for a battery inner resistance.
⭐ 5.0/5 | К***ч: Everything is great, the device works.
⭐ 5.0/5 | Е***ч: Excellent! Calibrated to zero!
⭐ 5.0/5 | С***ч: Everything works, good device.
⭐ 5.0/5 | AliExpress Shopper: High quality and precision product!
⭐ 5.0/5 | S***n: Arrived and working as expected
⭐ 5.0/5 | М***ч: everything works, there is an instruction in Russian
⭐ 5.0/5 | С***а: Delivered quickly, complete set! Thank you!!!
⭐ 5.0/5 | С***а: Delivered quickly, complete set! Thank you!!!
⭐ 5.0/5 | A***m: A quality product for a good price
⭐ 5.0/5 | К***ч: everything works, very satisfied with the product.
⭐ 5.0/5 | К***ч: Seller and Fnirsi are great! Fast shipping, good quality and on time.
⭐ 5.0/5 | A***y: Received the device, good quality, undamaged, will check tomorrow…!
⭐ 5.0/5 | А***в: Excellent. Fast delivery. Recommended.
⭐ 5.0/5 | a***o: all perfect
⭐ 5.0/5 | М***ч: For DIY, quite good.
⭐ 5.0/5 | И***ч: delivered quickly, thank you
⭐ 5.0/5 | AliExpress Shopper: Excellent Product
⭐ 5.0/5 | М***ч: Measures accurately!
⭐ 5.0/5 | F***n: fast delivery, excellent
⭐ 5.0/5 | A***z: Easy to use. Fast measurements. Two possibilities
⭐ 5.0/5 | В***ч: WORKS
⭐ 5.0/5 | AliExpress Shopper: Thank you very much for the excellent parcel.
⭐ 5.0/5 | О***ч: All good. Thank you
⭐ 5.0/5 | О***ч: useful thing
⭐ 5.0/5 | Ж***ч: The device works. I managed to barely fit all the contents, including alligator clips, probes, and even a battery case, into the case sold for it. The device firmware is v0.4, which is strange, only v0.3 is available on the website. I had to slightly trim the Type-C connector housing on the cable, because when connected to a computer, it charged, but the disk only appeared if the connector was pressed firmly against the device.
⭐ 5.0/5 | А***ч: Delivery to the post office in Moscow is very fast. The device is in working order. The packaging was not damaged during transportation. Thank you.
⭐ 5.0/5 | T***j: Beautiful design, first impressions — it works, showed 0.2 mOhm. I hope the measurements correspond to reality. Everything is clear, although now there are delays at the border, but overall — it arrived. That’s good. So the Chinese are great.
⭐ 5.0/5 | Ф***ч: the device arrived in working order 👍 thanks to the seller I recommend
⭐ 5.0/5 | М***ч: The parcel arrived within the specified time. Everything works and corresponds to the description. Photos attached, I recommend the seller.
⭐ 5.0/5 | AliExpress Shopper: Good milliohmmeter.
⭐ 5.0/5 | М***ч: Thank you!!! +5. Super!!!
⭐ 5.0/5 | Б***ч: Excellent quality, fast delivery
⭐ 5.0/5 | AliExpress Shopper: the cool tester works, the readings differ from others, it’s not clear who to believe
⭐ 5.0/5 | Л***ч: Arrived without damage. Seems to work. We’ll see later.
⭐ 5.0/5 | Р***ч: Fast delivery. Complete set. Good price. Recommended.
⭐ 5.0/5 | P***i: All Ok! Fast delivery.
⭐ 5.0/5 | M***i: Ok
⭐ 5.0/5 | S***i: 👍👍👍
⭐ 5.0/5 | AliExpress Shopper: Just arrived, don’t know its quality but it was received
⭐ 5.0/5 | Г***л: came in a box with boxes well wrapped
⭐ 5.0/5 | Р***ч: I recommend the seller. Sent a complete set.
⭐ 5.0/5 | А***в: Excellent packaging. Undamaged.
⭐ 5.0/5 | s***s: Thank you very much
⭐ 5.0/5 | R***d: Tester is very good quality.
⭐ 5.0/5 | Б***ч: Ok
⭐ 5.0/5 | Л***ч: ok
⭐ 5.0/5 | К***ч: normal
⭐ 4.0/5 | D***h: I waited for the product for a very long time, more than 60 days passed. I didn’t like it very much, but the device is good without problems.
⭐ 5.0/5 | d***d: super super super super super super super super super super
⭐ 5.0/5 | П***ч: Everything is great except for the delivery time. The delivery deadline was missed (2 weeks)… I ordered on November 28, 2025… and was only able to receive it on January 20, 2026.
⭐ 3.0/5 | AliExpress Shopper: conforms to the description not yet used fast delivery, quality tester no French language in the tool red and black cords too short I recommend the purchase
⭐ 5.0/5 | AliExpress Shopper: HOPM
⭐ 5.0/5 | b***i: super device super store
⭐ 5.0/5 | Ж***ч: Ordered 20.05.2025, shipped 22.05.2025, arrived 26.05.2025. It works, the last digit constantly jumps, it’s hard to get good contact with Kelvin clamps. But it shows quite accurately, checked on a 2mOhm shunt with 1% accuracy class and on 20mOhm (unknown accuracy).
⭐ 5.0/5 | О***ч: Super product, as always, FNIRSI has excellent products. I recommend this seller and his product to everyone. From FNIRSI company.
⭐ 5.0/5 | Г***ч: Measures voltage and resistance. Good packaging. Everything arrived intact and complete. All functions work. Instructions in Russian. Device with a charged battery.
⭐ 5.0/5 | Е***ч: Excellent! Complete set, factory packaging (in film) and express delivery! Very delicate spring-loaded probes, I accidentally bent one lead, so I put protective caps on the probes.
⭐ 5.0/5 | К***ч: Everything is great, good battery internal resistance tester. Fast delivery from a warehouse in Russia. Thank you!
⭐ 5.0/5 | С***в: overall the product corresponds to what was stated. but I would also like a set of resistors (reference) for calibration as an option.
⭐ 5.0/5 | З***ч: Excellent device, good packaging. Thank you
⭐ 5.0/5 | Е***й: There are many reviews for this device. Pros include a good case, good display, accurate measurement of small resistances and battery resistances with AC current, ability to measure batteries up to 100 volts.
⭐ 5.0/5 | К***ч: everything arrived intact and in the stated configuration. checked quickly, seems to work correctly. first impression is very good. many thanks to the seller for the product.
⭐ 5.0/5 | O***s: Delivery to parcel locker — 11 calendar days. Very high-quality packaging — an additional strong cardboard box completely wrapped in tape. The device itself arrived fully charged, performs its functions. No shortcomings found.
⭐ 5.0/5 | К***ч: Compared readings with a similar Fluke device. Error 1.3%. Acceptable accuracy.
⭐ 5.0/5 | R***h: Checked, works, additionally purchased a rod probe. Will use it.
⭐ 5.0/5 | E***h: Thanks, everything is fine, received on time. Haven’t checked yet.
⭐ 1.0/5 | Л***ч: The device does not calibrate for resistance. Version v-o4. The alligator clip wires were checked for continuity, connections are present.
⭐ 5.0/5 | х***ч: the device is fine. the wires are stiff. I will replace them with silicone.
⭐ 5.0/5 | В***в: Wonderful thing!
⭐ 5.0/5 | B***r: excellent product.
⭐ 5.0/5 | A***t: Works great, don’t know about accuracy but seems alright.
⭐ 5.0/5 | Ж***ч: excellent tester. I generally like Fnirsi devices.
⭐ 5.0/5 | Z***a: Everything is great!
⭐ 5.0/5 | К***ч: everything works
⭐ 5.0/5 | К***ч: Excellent product! Excellent seller!!!
⭐ 5.0/5 | М***ч: it’ll do, fine, received the full set
⭐ 5.0/5 | O***o:
⭐ 4.0/5 | m***r: Device seems very high quality, manual not very helpful, menu navigation cumbersome, not intuitive…Bag missing, not offered…?! I am satisfied…thanks
⭐ 5.0/5 | А***ч: Fnirsi, well done, excellent devices. Thanks to the seller.
⭐ 4.0/5 | Х***й: The tester is excellent. The wires are stiff and short. It is very inconvenient to take measurements. The device is unstable at the same time. Measuring 18650 and 21700 with probes is quite a process.
⭐ 5.0/5 | Б***ч: Another great device from Fnirsi
⭐ 5.0/5 | C***m:
⭐ 5.0/5 | Б***ч: Excellent product
⭐ 5.0/5 | М***ч: Liked the tester.
⭐ 5.0/5 | Z***k: Satisfied with the device.
⭐ 5.0/5 | AliExpress Shopper: Good quality
⭐ 5.0/5 | H***o: Looks promising
⭐ 5.0/5 | M***M: Super! worth it!
⭐ 5.0/5 | Т***ь: Excellent device
⭐ 5.0/5 | N***i: OK, ok
⭐ 5.0/5 | F***z: 100 x 100 perfect
⭐ 5.0/5 | Y***k: Great, Thank you!
⭐ 1.0/5 | С***ь: The product itself is good, but I didn’t think that the official store doesn’t check the product or sends it like that intentionally, it couldn’t oxidize on the way, but these are probes, what will be the accuracy of the measurement? The negative probe is visible in the photo. The product itself is excellent, there was a problem with one probe, but this was either how it was stored or delivery, the seller offered compensation, in general, everything was quickly settled, the seller is communicative and caring, for which special thanks!

Pinout and Interface Map

Pinout Configuration: HRM-10 Battery Voltage Internal Resistance Tester

Below is the detailed pin mapping for the dual-MCU architecture:

Final summary

Final Verdict: HRM-10 Battery Voltage Internal Resistance Tester

The FNIRSI HRM-10 Battery Voltage Internal Resistance Tester stands out as a highly capable and reliable tool for anyone serious about battery diagnostics. Its impressive accuracy of ±0.5% across wide voltage (0-±100V DC) and resistance (0-200Ω) ranges, coupled with advanced data management features like history recording and export, makes it an excellent investment. While some minor ergonomic issues with probe stiffness and the lack of a dedicated storage case are noted, these are largely overshadowed by its robust build quality, user-friendly interface, and the invaluable insights it provides into battery health. For hobbyists, DIY enthusiasts, and professionals alike, the HRM-10 offers a compelling balance of performance and value, making it an ideal choice for ensuring the longevity and optimal performance of battery systems. The ability to accurately assess and track battery health is its paramount advantage, far outweighing any minor inconveniences. For more in-depth analyses, visit andibond.com.